Senior Software Engineer

Insight Global; Greater London; On-site; GBP 111,000 - 148,000; Full time

Job summary

Insight Global are seeking a Senior Software Developer for a leading global financial services organisation. The role focuses on designing, developing and maintaining enterprise-scale Java applications while owning delivery across the full software development lifecycle.

The position requires five days onsite per week in London on a 6-month initial contract with extensions and is Inside IR35. The successful candidate will work on modernising legacy platforms, greenfield development, platform

Qualifications

• Strong backend software engineering experience in enterprise environments.
• Proficient in Core Java (JDK 8+).
• Solid understanding of Java fundamentals, OOP, and design patterns.
• Experience using AI tools to support development.
• Experience with RESTful services and microservices.
• Good SQL skills and relational databases.
• Ability to deliver across the full SDLC.

Responsibilities

• Design, develop and maintain scalable Java-based applications.
• Deliver software solutions across the full development lifecycle.
• Support migration from legacy to modern platforms.
• Contribute to greenfield development initiatives.
• Enhance data architecture and data flows.
• Write clean, maintainable code and follow best practices.

Skills

Core Java (JDK 8+)

OOP & design patterns

RESTful services

Microservices

SQL / relational DBs

Algorithms & data structures

Debugging / troubleshooting

AI tooling for development

Cloud & Kubernetes

Shell scripting

Tools

Kubernetes

Shell scripting

Cloud technologies

Job description

Insight Global are seeking a Senior Software Developer for a leading global financial services organisation. This role will focus on designing, developing and maintaining enterprise-scale Java applications while taking ownership of delivery across the full software development lifecycle.

This position requires 5 days onsite per week in London for a 6-month initial contract with extensions through next year and is classified as Inside IR35.

The successful candidate will work across a variety of strategic initiatives including modernising legacy platforms, greenfield development, platform upgrades, and enhancing data architecture and data flows across critical business systems. This is a highly hands-on engineering position with daily coding responsibilities.

Key Responsibilities:

• Design, develop and maintain scalable Java-based applications
• Deliver high-quality software solutions across the full development lifecycle
• Support migration of legacy applications to modern platforms
• Contribute to greenfield development initiatives
• Enhance and optimise existing platforms and services
• Improve data strategies and data integration processes
• Collaborate closely with engineering and business stakeholders to deliver strategic technology initiatives
• Write clean, maintainable, and efficient code while contributing to best engineering practices

Must-Have Requirements Include:

• Strong backend software engineering experience within enterprise environments
• Demonstrable experience with Core Java (JDK 8+)
• Excellent understanding of Java fundamentals, object-oriented design, and design patterns
• Experience leveraging AI tools and technologies to support software development
• Strong knowledge of algorithms, design concepts, and data structures
• Proven debugging and troubleshooting capabilities within complex codebases
• Experience developing and consuming RESTful web services
• Strong experience designing and building microservices architectures
• Understanding of database technologies and relational database management systems
• Experience writing and analysing complex SQL queries, including multi-table joins and aggregate functions
• Ability to deliver solutions across the full software development lifecycle

Plusses Include:

• Experience with cloud technologies and Kubernetes deployments
• Previous involvement in legacy-to-modern platform migration projects
• Basic shell scripting knowledge
• Financial services or capital markets experience